Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4d89a7cee524cec565024fc12f7aac711fb320a50b5f39325e77c6e494e01e4' 
  AND token = '8+9rFCLTkWM/F8D44fTWzXoXUH/luJtMqaOtFm9L16c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}